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3: OPERATION INDICATORS AND CONTROLS ON THE SMART-UPS
The APC Uninterruptible Power Supply (UPS) is designed to prevent blackouts, brownouts, sags and
surges from reaching your computer and other valuable electronic equipment. The UPS filters out
small utility line fluctuations and isolates your equipment from large disturbances by internally dis-
connecting from the utility line. The UPS provides continuous power from its internal batteries until
the utility line returns to safe levels.
The Smart-UPS has the power control and operating indicators located on the front panel. The rear
panel has the input and output connectors.
SMART-UPS FRONT PANEL
The ON and OFF buttons are used to power the UPS and act as master controls for the connected
equipment. (Make sure connected loads are switched to their ON position) The UPS remains on as
long as it is attached to utility power.
OPERATION
Power On Press and release the button labeled, TEST, to supply power to the UPS
and connected equipment. The equipment is immediately powered and the
UPS performs a self-test.
The charger maintains battery charge when the UPS is plugged in and
utility voltage is present.
Power Off Press and release the button labeled, 0, to turn off power to the UPS and
connected equipment.
Load The five-LED display on the left of the front panel shows the percentage
of available power used by the connected equipment (load). For example,
if three LEDs are lit, the connected load is drawing between 50% and 67%
of the UPS capacity. If all five LEDs are lit, the connected load is drawing
between 85% and 100% of capacity. Thoroughly test your entire system to
make sure that the UPS will not become overloaded. In the graphic to the
left, the load capacity threshold is listed next to the LED (these are not
shown on the actual UPS).